The FIA will have an upgrade which should allow the full functionality of the cockpit warning system at the Spanish Grand Prix.

The opening four races have seen problems with the telemetry link between race control and the cars, with race control unable to automatically disable DRS. Drivers have also been without warning lights in the cockpit to reinforce the flags waved around the circuit, but one of the FIA's driver stewards - Derek Warwick - told Reuters that the issue should be resolved in Barcelona.

"We've been told they've got an upgrade which is going to Barcelona and then it'll be working from there," he said.

Warwick also admitted the FIA had been forced to be more lenient with drivers in certain situations because of the lack of help they were receiving from race control when out on track.

"You can't blame a driver if we've messed up in terms of the support package. The FIA has asked us to be lighter on fines for the drivers, but we still have the same tools available to us for other punishments."